The Cawthron Institute has worked alongside regional councils to verify the processes and methods used for data collection, laboratory analysis of samples collected and the statistical analysis and interpretation of the results presented.

If all Cawthron ticks are green, then you can trust this data. However, if one or more ticks are orange, then conclusions should be treated with some caution.

All samples were collected using approved field protocols and have been analysed in accredited laboratories. Therefore the data shown here has been collected and analysed following best practice.

State

All samples were collected using approved field protocols and have been analysed in accredited laboratories.

Trend - SAMPLING FREQUENCY

Samples are collected monthly at this site. Proposed national guidelines suggest monthly sampling is required for trend analysis. Therefore, any trends shown here are based on best practice in terms of sampling frequency.

Bacteria

E. coli

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State

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State

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{{nofMsg(ECOLI.NofMedianScore)}}Annual median

N/A

NOF BandAnnual median

Trend

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Sample history at this site

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E. coli samples for Waipapa at Old Highway

n/100ml

What is this graph showing me?

This graph is displaying E. coli concentrations over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.

What do the icons mean?

It is important to note that changes to the National Policy Statement for Freshwater Management 2014 were announced in August 2017. The changes have removed the below set of criteria for E. coli, and any reference to this use of water (i.e. occasional immersion). The new criteria, effective from 6 September 2017, are for the use of water for swimming and other full contact, sustained exposure activities (diving, surfing etc). The data on LAWA has not yet been updated to reflect the new requirements.

The bands for E. coli are as outlined in the NOF for freshwater:

A

Water quality is considered suitable for the designated use.People are exposed to a very low risk of infection (less than 0.1% risk) from contact with water during activities with occasional immersion (such as wading and boating).

B

Water quality is considered suitable for the designated use.People are exposed to a low risk of infection (less than 1% risk) from contact with water during activities with occasional immersion (such as wading and boating).

C

Water quality is considered suitable for the designated use.People are exposed to a moderate risk of infection (less than 5% risk) from contact with water during activities with occasional immersion (such as wading and boating).

National bottom line: Annual median 1000 n/100mL.

D

Water quality is not considered suitable for the designated use.People are exposed to a high risk of infection (greater than 5% risk) from contact with water during activities with occasional immersion (such as wading and boating).

Clarity

State

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Trend

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Sample history at this site

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Black Disc samples for Waipapa at Old Highway

metres

What is this graph showing me?

This graph is displaying Black Disc readings over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.

State

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Trend

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Sample history at this site

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Turbidity samples for Waipapa at Old Highway

NTU

What is this graph showing me?

This graph is displaying Turbidity levels over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.

Nitrogen

State

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Trend

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Sample history at this site

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Total Nitrogen samples for Waipapa at Old Highway

g/m3

What is this graph showing me?

This graph is displaying Total Nitrogen concentrations over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.

State

Trend

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Sample history at this site

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Total Oxidised Nitrogen samples for Waipapa at Old Highway

g/m3

What is this graph showing me?

This graph is displaying Total Oxidised Nitrogen concentrations over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.

Water quality is not considered suitable for the designated use.Impacts on growth of multiple species, and effects starts approaching acute impact level (i.e. risk of death) for sensitive species at higher concentrations (>20 mg/L).

State

Trend

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Sample history at this site

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Ammoniacal Nitrogen samples for Waipapa at Old Highway

g/m3

What is this graph showing me?

This graph is displaying Ammoniacal Nitrogen concentrations over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.

Phosphorus

State

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Trend

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Sample history at this site

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Dissolved Reactive Phosphorus samples for Waipapa at Old Highway

g/m3

What is this graph showing me?

This graph is displaying Dissolved Reactive Phosphorus concentrations over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.

State

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Trend

{{trendMsg(TP)}}

Sample history at this site

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Total Phosphorus samples for Waipapa at Old Highway

g/m3

What is this graph showing me?

This graph is displaying Total Phosphorus concentrations over the selected time period. You can adjust this period by changing the dropdowns. These records form the basis for the state and trend indicators displayed on the dashboard. This data is raw and has not had any methodology applied to it.